石粉对混凝土抗渗性能的影响
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摘要
通过电通量法研究了钙质石粉(石灰石粉和大理石粉)和硅质石粉(花岗岩石粉和玄武岩石粉)对混凝土抗渗性能的影响,并用吸水动力学法测试了胶砂的吸水率和平均孔径。结果表明,石粉掺量在10%~30%范围内,28d龄期混凝土电通量随着石粉掺量增加而逐渐增大,掺石灰石粉、大理石粉、花岗岩石粉和玄武岩石粉混凝土电通量较未掺石粉的混凝土电通量增大范围分别为45.0%~75.2%、17.9%~46%、23.2%~49.4%和32.7%~64.4%。28 d龄期胶砂的吸水率与平均孔径也随石粉掺量的增加而增大,掺量在10%~30%范围内时,掺石灰石粉、大理石粉、花岗岩石粉和玄武岩石粉胶砂试件平均孔径较未掺石粉的胶砂平均孔径增大范围分别为18.8%~34.6%、8.8%~19.8%、15.4%~34.6%和16.8%~39.4%。石粉降低混凝土抗渗性能与其导致胶砂孔结构粗化有着较好的对应关系。
The influence of ground calcareous stone powder( ground limestone and ground marble) and ground siliceous stone powder( ground granite and ground basalt) on the impermeability of concrete were studied by electric flux method,and the water absorption and average pore diameter of the mortars was measured according to the results of capillary adsorption test. The results showthat the electric flux of the concrete and the water absorption and average pore diameter of the mortars increas gradually with the ground stone powder content increasing at the age of 28 d. When the ground stone powder content was in the range of 10%~30%,the electric flux of the concrete with ground limestone,ground marble,ground granite or ground basalt increased by 45.0%~ 75.2%,17.9%~ 46%,23.2%~ 49.4%and 32.7%~64.4%compared with the concrete without ground stone powder,and the average pore diameter of the mortars with ground limestone,ground marble,ground graniteor ground basalt increased by 18.8%~34.6%,8.8%~19.8%,15.4%~34.6% and 16.8%~ 39.4%compared with the mortars without ground stone powder.
The influence of ground calcareous stone powder( ground limestone and ground marble) and ground siliceous stone powder( ground granite and ground basalt) on the impermeability of concrete were studied by electric flux method,and the water absorption and average pore diameter of the mortars was measured according to the results of capillary adsorption test. The results showthat the electric flux of the concrete and the water absorption and average pore diameter of the mortars increas gradually with the ground stone powder content increasing at the age of 28 d. When the ground stone powder content was in the range of 10%~30%,the electric flux of the concrete with ground limestone,ground marble,ground granite or ground basalt increased by 45.0%~ 75.2%,17.9%~ 46%,23.2%~ 49.4%and 32.7%~64.4%compared with the concrete without ground stone powder,and the average pore diameter of the mortars with ground limestone,ground marble,ground graniteor ground basalt increased by 18.8%~34.6%,8.8%~19.8%,15.4%~34.6% and 16.8%~ 39.4%compared with the mortars without ground stone powder.
引文
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[16]王稷良,周明凯,贺图升,等.石粉对机制砂混凝土抗渗透性和抗冻融性能的影响[J].硅酸盐学报,2008,36(4):482-486.
[17]陈健中.用吸水动力学法测定混凝土的孔结构参数[J].混凝土,1989(6):9-13.
[2]马昆林,龙广成,谢友均,等.水泥—粉煤灰—石灰石粉复合浆体的流变性能[J].硅酸盐学报,2013,41(5):582-596.
[3]刘数华.石灰石粉对复合胶凝材料水化特征的影响[J].建筑材料学报,2010,13(2):218-221.
[4]刘数华,阎培渝.石灰石粉对水泥浆体填充效应和胶砂孔结构的影响[J].硅酸盐学报,2008,36(1):69-77.
[5]袁航.石灰石粉对混凝土性能的影响[D].长沙:中南大学,2009.
[6]陈喜旺.石灰石粉对混凝土拌合物性能的影响[D].北京:清华大学,2010.
[7]郭育霞,贡金鑫,李晶.石粉掺量对混凝土力学性能及耐久性的影响[J].建筑材料学报,2009,12(3):266-271.
[8]TSIVILIS S,BATIS G,et al.Properties and behavior of limestone cement concrete and mortar[J].Cement Concrete Research,2000,30(10):1679-1683.
[9]曹鹏飞,秦鸿根,庞超明.掺石灰石粉自密实混凝土性能的研究[J].施工技术,2005,34(增刊):35-43.
[10]李凤兰,郭克宁,徐阳洋.原状机制砂混凝土的氯离子渗透于碳化性能试验研究[J].混凝土,2011(12):67-69.
[11]TSIVILIS S,BATIS G,CHANIOTAKIS E,et al.Properties and behavior of limestone cement concrete and mortar[J].Cement and Concrete Research,2000,30(10):1679-1683.
[12]肖佳,邓德华,唐咸燕,等.用粉煤灰改善石灰石粉混凝土的氯离子扩散性[J].中南林业科技大学学报,2008,27(5):79-82.
[13]马烨红.石灰石粉作混凝土矿物掺合料的研究[D].广州:华南理工大学,2007.
[14]熊远柱,万慧文.石灰石粉对混凝土性能的影响[J].混凝土,2010(9):89-91.
[15]王雨利,周明凯,李北星,等.石粉对水泥湿堆积密度和混凝土性能的影响[J].重庆建筑大学学报,2008,30(6):151-154.
[16]王稷良,周明凯,贺图升,等.石粉对机制砂混凝土抗渗透性和抗冻融性能的影响[J].硅酸盐学报,2008,36(4):482-486.
[17]陈健中.用吸水动力学法测定混凝土的孔结构参数[J].混凝土,1989(6):9-13.